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Posted to dev@poi.apache.org by "Andreas Beeker (Jira)" <ji...@apache.org> on 2021/06/22 22:39:01 UTC
[jira] [Resolved] (XMLBEANS-481) Base64 to byte[] is not very
efficient
[ https://issues.apache.org/jira/browse/XMLBEANS-481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andreas Beeker resolved XMLBEANS-481.
-------------------------------------
Fix Version/s: Version 5.0.1
Assignee: Andreas Beeker
Resolution: Fixed
Thanks for bringing this up.
Fixed via [r1890981|https://svn.apache.org/viewvc?view=revision&revision=1890981]
> Base64 to byte[] is not very efficient
> --------------------------------------
>
> Key: XMLBEANS-481
> URL: https://issues.apache.org/jira/browse/XMLBEANS-481
> Project: XMLBeans
> Issue Type: Improvement
> Components: DOM
> Affects Versions: Version 2.5
> Reporter: Matej Spiller-Muys
> Assignee: Andreas Beeker
> Priority: Major
> Fix For: Version 5.0.1
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We are using 30 mb large byte[] string represented as base64 binary type in shema and it is causing out of memory for us on server. Basically converting from base64 string to byte[] is not very efficient.
> JavaBase64Holder.java is using: vBytes = v.getBytes("UTF-8") and according to http://www.evanjones.ca/software/java-string-encoding-internals.html it uses base64 size * 4. In our case where there is 30mb large byte[] it uses around 160 mb just for converting string into byte[].
> Would it be possible to use v.getBytes("ASCII")? This would reduce the memory usage when converting from string to byte[] by 4 times.
> According to http://www.w3.org/TR/xmlschema-2/#base64Binary it should use only ASCII chars anyway.
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